Interpretation #7190

Original Request

Code Version: 2010
Code: BUILDING
Code Description: Building
Chapter: 1
Section: 102.8
Topic: Rooftop Mechanical Unit Changeout

Question

Is it the intent of section 102.8 of the 2010 Florida Building Code to require an equal change out of a roof top mechanical unit to comply with section 1509.7?

Answer Published 06/01/2013 at 10:57 AM

Yes, the replacement of mechanical
equipment on an existing roof would
need to comply with the requirements of
FBC-B 1509.7. Section 102.8 was added
to the code as a result of legislation
to prevent AHJs from requiring units be
installed on stands where the equipment
otherwise would not have been removed
or replaced as a function of a re-roof
or other work. However, if the
equipment is located on the roof and
must be removed or replaced, then
section 102.8 would imply the AHJ may
require the new unit to be installed in
compliance with the appropriate code
sections.

Commentary

Most would agree that equipment replacement would constitute a Level 1 Alteration. Section 602.4 requires all "New Work" to comply with the requirements of the FBC-Building, Mechanical, Energy and Plumbing. Thus the link from The FBC-Existing to FBC-B Section 1509.7. If the re-roofing can be done without removing or replacing the rooftop equipment, then applying 1509.7 would be inappropriate. However, once the equipment is disconnected from the electrical, refrigeration and/or duct, then it would need to be installed on a stand and appropriately anchored to meet the wind resistance.